大豆收获时 ,经常由于大豆水分、收获方式、脱粒元件等原因造成收获时籽粒损伤 ,从而影响商品粮的等级和种子发芽率。在这些影响因素中 ,脱粒元件的结构和工作原理及使用调整是产生籽粒损伤的主要原因。过去的脱粒装置主要采用纹杆滚筒式 ,靠纹杆的打击和揉搓脱粒 ,结构较简单 Soybean harvest, often due to the soybean moisture, harvesting methods, threshing elements and other causes of grain damage at harvest, thus affecting the level of commodity grain and seed germination rate. Among these influencing factors, the structure, working principle and adjustment of the threshing element are the main causes of grain damage. In the past, the threshing device mainly adopted the grain-rolling drum type, which was thickened by the striking and kneading of the grain stem. The structure was simple